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1c280088 | 1 | /** @file\r |
b75a165d | 2 | MDE DXE Services Library provides functions that simplify the development of DXE Drivers. \r |
84716614 | 3 | These functions help access data from sections of FFS files or from file path.\r |
1c280088 | 4 | \r |
d7b96017 | 5 | Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>\r |
711ef3f6 | 6 | (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r |
19388d29 | 7 | This program and the accompanying materials\r |
1c280088 | 8 | are licensed and made available under the terms and conditions of the BSD License\r |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
2fc59a00 | 10 | http://opensource.org/licenses/bsd-license.php.\r |
1c280088 | 11 | \r |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <PiDxe.h>\r | |
18 | #include <Library/DebugLib.h>\r | |
19 | #include <Library/MemoryAllocationLib.h>\r | |
20 | #include <Library/UefiBootServicesTableLib.h>\r | |
84716614 LG |
21 | #include <Library/DevicePathLib.h>\r |
22 | #include <Library/UefiLib.h>\r | |
eb9dd4d0 | 23 | #include <Library/DxeServicesLib.h>\r |
1c280088 | 24 | #include <Protocol/FirmwareVolume2.h>\r |
25 | #include <Protocol/LoadedImage.h>\r | |
84716614 LG |
26 | #include <Protocol/LoadFile2.h>\r |
27 | #include <Protocol/LoadFile.h>\r | |
28 | #include <Protocol/SimpleFileSystem.h>\r | |
29 | #include <Guid/FileInfo.h>\r | |
1c280088 | 30 | \r |
31 | /**\r | |
166152e8 | 32 | Identify the device handle from which the Image is loaded from. As this device handle is passed to\r |
33 | GetSectionFromFv as the identifier for a Firmware Volume, an EFI_FIRMWARE_VOLUME2_PROTOCOL \r | |
34 | protocol instance should be located succesfully by calling gBS->HandleProtocol ().\r | |
1c280088 | 35 | \r |
166152e8 | 36 | This function locates the EFI_LOADED_IMAGE_PROTOCOL instance installed\r |
37 | on ImageHandle. It then returns EFI_LOADED_IMAGE_PROTOCOL.DeviceHandle.\r | |
38 | \r | |
39 | If ImageHandle is NULL, then ASSERT ();\r | |
40 | If failed to locate a EFI_LOADED_IMAGE_PROTOCOL on ImageHandle, then ASSERT ();\r | |
41 | \r | |
42 | @param ImageHandle The firmware allocated handle for UEFI image.\r | |
1c280088 | 43 | \r |
58380e9c | 44 | @retval EFI_HANDLE The device handle from which the Image is loaded from.\r |
1c280088 | 45 | \r |
46 | **/\r | |
166152e8 | 47 | EFI_HANDLE\r |
48 | InternalImageHandleToFvHandle (\r | |
49 | EFI_HANDLE ImageHandle\r | |
50 | )\r | |
51 | {\r | |
52 | EFI_STATUS Status;\r | |
53 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
54 | \r | |
55 | ASSERT (ImageHandle != NULL);\r | |
56 | \r | |
57 | Status = gBS->HandleProtocol (\r | |
58 | (EFI_HANDLE *) ImageHandle,\r | |
59 | &gEfiLoadedImageProtocolGuid,\r | |
60 | (VOID **) &LoadedImage\r | |
61 | );\r | |
62 | \r | |
63 | ASSERT_EFI_ERROR (Status);\r | |
64 | \r | |
d7b96017 SZ |
65 | //\r |
66 | // The LoadedImage->DeviceHandle may be NULL.\r | |
67 | // For example for DxeCore, there is LoadedImage protocol installed for it, but the\r | |
68 | // LoadedImage->DeviceHandle could not be initialized before the FV2 (contain DxeCore)\r | |
69 | // protocol is installed.\r | |
70 | //\r | |
166152e8 | 71 | return LoadedImage->DeviceHandle;\r |
72 | \r | |
73 | }\r | |
74 | \r | |
75 | /**\r | |
b75a165d LG |
76 | Allocate and fill a buffer from a Firmware Section identified by a Firmware File GUID name, a Firmware \r |
77 | Section type and instance number from the specified Firmware Volume.\r | |
78 | \r | |
79 | This functions first locate the EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance on FvHandle in order to \r | |
80 | carry out the Firmware Volume read operation. The function then reads the Firmware Section found sepcifed \r | |
81 | by NameGuid, SectionType and SectionInstance. \r | |
82 | \r | |
83 | The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection () \r | |
84 | found in PI Specification.\r | |
85 | \r | |
86 | If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section \r | |
87 | is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND \r | |
88 | is returned.\r | |
166152e8 | 89 | \r |
b75a165d LG |
90 | The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated \r |
91 | by this function. This function can be only called at TPL_NOTIFY and below.\r | |
166152e8 | 92 | \r |
b75a165d LG |
93 | If NameGuid is NULL, then ASSERT();\r |
94 | If Buffer is NULL, then ASSERT();\r | |
95 | If Size is NULL, then ASSERT().\r | |
96 | \r | |
58380e9c | 97 | @param FvHandle The device handle that contains a instance of \r |
98 | EFI_FIRMWARE_VOLUME2_PROTOCOL instance.\r | |
b75a165d LG |
99 | @param NameGuid The GUID name of a Firmware File.\r |
100 | @param SectionType The Firmware Section type.\r | |
58380e9c | 101 | @param SectionInstance The instance number of Firmware Section to \r |
102 | read from starting from 0.\r | |
103 | @param Buffer On output, Buffer contains the the data read \r | |
104 | from the section in the Firmware File found.\r | |
b75a165d LG |
105 | @param Size On output, the size of Buffer.\r |
106 | \r | |
107 | @retval EFI_SUCCESS The image is found and data and size is returned.\r | |
58380e9c | 108 | @retval EFI_NOT_FOUND The image specified by NameGuid and SectionType \r |
109 | can't be found.\r | |
110 | @retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the \r | |
111 | output data buffer or complete the operations.\r | |
112 | @retval EFI_DEVICE_ERROR A hardware error occurs during reading from the \r | |
113 | Firmware Volume.\r | |
114 | @retval EFI_ACCESS_DENIED The firmware volume containing the searched \r | |
115 | Firmware File is configured to disallow reads.\r | |
166152e8 | 116 | \r |
f80b0830 | 117 | **/\r |
1c280088 | 118 | EFI_STATUS\r |
eb9dd4d0 | 119 | InternalGetSectionFromFv (\r |
166152e8 | 120 | IN EFI_HANDLE FvHandle,\r |
121 | IN CONST EFI_GUID *NameGuid,\r | |
122 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 123 | IN UINTN SectionInstance,\r |
166152e8 | 124 | OUT VOID **Buffer,\r |
125 | OUT UINTN *Size\r | |
1c280088 | 126 | )\r |
127 | {\r | |
166152e8 | 128 | EFI_STATUS Status;\r |
129 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
130 | UINT32 AuthenticationStatus;\r | |
131 | \r | |
8cf43dd7 | 132 | ASSERT (NameGuid != NULL);\r |
133 | ASSERT (Buffer != NULL);\r | |
134 | ASSERT (Size != NULL);\r | |
135 | \r | |
d7b96017 SZ |
136 | if (FvHandle == NULL) {\r |
137 | //\r | |
138 | // Return EFI_NOT_FOUND directly for NULL FvHandle.\r | |
139 | //\r | |
140 | return EFI_NOT_FOUND;\r | |
141 | }\r | |
166152e8 | 142 | \r |
143 | Status = gBS->HandleProtocol (\r | |
144 | FvHandle,\r | |
145 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
146 | (VOID **) &Fv\r | |
147 | );\r | |
148 | if (EFI_ERROR (Status)) {\r | |
7ca066f9 | 149 | return EFI_NOT_FOUND;\r |
166152e8 | 150 | }\r |
1c280088 | 151 | \r |
152 | //\r | |
153 | // Read desired section content in NameGuid file\r | |
154 | //\r | |
155 | *Buffer = NULL;\r | |
156 | *Size = 0;\r | |
157 | Status = Fv->ReadSection (\r | |
158 | Fv,\r | |
159 | NameGuid,\r | |
160 | SectionType,\r | |
ff197efb | 161 | SectionInstance,\r |
1c280088 | 162 | Buffer,\r |
163 | Size,\r | |
164 | &AuthenticationStatus\r | |
165 | );\r | |
166 | \r | |
167 | if (EFI_ERROR (Status) && (SectionType == EFI_SECTION_TE)) {\r | |
168 | //\r | |
166152e8 | 169 | // Try reading PE32 section, if the required section is TE type \r |
1c280088 | 170 | //\r |
171 | *Buffer = NULL;\r | |
172 | *Size = 0;\r | |
173 | Status = Fv->ReadSection (\r | |
174 | Fv,\r | |
175 | NameGuid,\r | |
176 | EFI_SECTION_PE32,\r | |
ff197efb | 177 | SectionInstance,\r |
1c280088 | 178 | Buffer,\r |
179 | Size,\r | |
180 | &AuthenticationStatus\r | |
181 | );\r | |
182 | }\r | |
183 | \r | |
1c280088 | 184 | return Status;\r |
185 | }\r | |
186 | \r | |
682cee4c LG |
187 | /**\r |
188 | Searches all the available firmware volumes and returns the first matching FFS section. \r | |
189 | \r | |
190 | This function searches all the firmware volumes for FFS files with FV file type specified by FileType\r | |
191 | The order that the firmware volumes is searched is not deterministic. For each available FV a search \r | |
192 | is made for FFS file of type FileType. If the FV contains more than one FFS file with the same FileType, \r | |
193 | the FileInstance instance will be the matched FFS file. For each FFS file found a search \r | |
194 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances \r | |
195 | of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. \r | |
196 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
197 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
198 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections \r | |
199 | are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
200 | \r | |
201 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
202 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
203 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
204 | \r | |
205 | If Buffer is NULL, then ASSERT().\r | |
206 | If Size is NULL, then ASSERT().\r | |
207 | \r | |
58380e9c | 208 | @param FileType Indicates the FV file type to search for within all \r |
209 | available FVs.\r | |
210 | @param FileInstance Indicates which file instance within all available \r | |
211 | FVs specified by FileType.\r | |
682cee4c | 212 | FileInstance starts from zero.\r |
58380e9c | 213 | @param SectionType Indicates the FFS section type to search for \r |
214 | within the FFS file \r | |
682cee4c LG |
215 | specified by FileType with FileInstance.\r |
216 | @param SectionInstance Indicates which section instance within the FFS file \r | |
58380e9c | 217 | specified by FileType with FileInstance to retrieve. \r |
218 | SectionInstance starts from zero.\r | |
219 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
220 | containing the FFS file section that was found.\r | |
221 | Is it the caller's responsibility to free this \r | |
222 | buffer using FreePool().\r | |
682cee4c LG |
223 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
224 | \r | |
225 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
226 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 227 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
228 | the matching FFS section.\r | |
229 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
230 | device error.\r | |
231 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because \r | |
232 | the firmware volume that \r | |
682cee4c LG |
233 | contains the matching FFS section does not allow reads.\r |
234 | **/\r | |
235 | EFI_STATUS\r | |
236 | EFIAPI\r | |
237 | GetSectionFromAnyFvByFileType (\r | |
238 | IN EFI_FV_FILETYPE FileType,\r | |
239 | IN UINTN FileInstance,\r | |
240 | IN EFI_SECTION_TYPE SectionType,\r | |
241 | IN UINTN SectionInstance,\r | |
242 | OUT VOID **Buffer,\r | |
243 | OUT UINTN *Size\r | |
244 | )\r | |
245 | {\r | |
246 | EFI_STATUS Status;\r | |
247 | EFI_HANDLE *HandleBuffer;\r | |
248 | UINTN HandleCount;\r | |
249 | UINTN IndexFv;\r | |
250 | UINTN IndexFile;\r | |
251 | UINTN Key;\r | |
252 | EFI_GUID NameGuid;\r | |
253 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
254 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
255 | \r | |
256 | //\r | |
257 | // Locate all available FVs.\r | |
258 | //\r | |
259 | HandleBuffer = NULL;\r | |
260 | Status = gBS->LocateHandleBuffer (\r | |
261 | ByProtocol,\r | |
262 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
263 | NULL,\r | |
264 | &HandleCount,\r | |
265 | &HandleBuffer\r | |
266 | );\r | |
267 | if (EFI_ERROR (Status)) {\r | |
268 | return Status;\r | |
269 | }\r | |
270 | \r | |
271 | //\r | |
272 | // Go through FVs one by one to find the required section data.\r | |
273 | //\r | |
274 | for (IndexFv = 0; IndexFv < HandleCount; IndexFv++) {\r | |
275 | Status = gBS->HandleProtocol (\r | |
276 | HandleBuffer[IndexFv],\r | |
277 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
278 | (VOID **)&Fv\r | |
279 | );\r | |
280 | if (EFI_ERROR (Status)) {\r | |
281 | continue;\r | |
282 | }\r | |
283 | \r | |
284 | //\r | |
285 | // Use Firmware Volume 2 Protocol to search for a file of type FileType in all FVs.\r | |
286 | //\r | |
287 | IndexFile = FileInstance + 1;\r | |
288 | Key = 0;\r | |
289 | do {\r | |
290 | Status = Fv->GetNextFile (Fv, &Key, &FileType, &NameGuid, &Attributes, Size);\r | |
291 | if (EFI_ERROR (Status)) {\r | |
292 | break;\r | |
293 | }\r | |
294 | IndexFile --;\r | |
295 | } while (IndexFile > 0);\r | |
b0d803fe | 296 | \r |
682cee4c LG |
297 | //\r |
298 | // Fv File with the required FV file type is found.\r | |
299 | // Search the section file in the found FV file.\r | |
300 | //\r | |
301 | if (IndexFile == 0) {\r | |
302 | Status = InternalGetSectionFromFv (\r | |
303 | HandleBuffer[IndexFv], \r | |
304 | &NameGuid,\r | |
305 | SectionType,\r | |
306 | SectionInstance,\r | |
307 | Buffer,\r | |
308 | Size\r | |
309 | );\r | |
310 | \r | |
311 | if (!EFI_ERROR (Status)) {\r | |
312 | goto Done;\r | |
313 | }\r | |
314 | }\r | |
315 | }\r | |
316 | \r | |
317 | //\r | |
318 | // The required FFS section file is not found. \r | |
319 | //\r | |
320 | if (IndexFv == HandleCount) {\r | |
321 | Status = EFI_NOT_FOUND;\r | |
322 | }\r | |
323 | \r | |
324 | Done:\r | |
325 | if (HandleBuffer != NULL) { \r | |
116b142d | 326 | FreePool(HandleBuffer);\r |
682cee4c LG |
327 | }\r |
328 | \r | |
329 | return Status;\r | |
330 | }\r | |
b0d803fe | 331 | \r |
f80b0830 | 332 | /**\r |
b75a165d LG |
333 | Searches all the availables firmware volumes and returns the first matching FFS section. \r |
334 | \r | |
335 | This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid. \r | |
336 | The order that the firmware volumes is searched is not deterministic. For each FFS file found a search \r | |
337 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances \r | |
338 | of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. \r | |
339 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
340 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
341 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections \r | |
342 | are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
343 | \r | |
344 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
345 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
346 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
347 | \r | |
348 | If NameGuid is NULL, then ASSERT().\r | |
349 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 350 | If Size is NULL, then ASSERT().\r |
351 | \r | |
f80b0830 | 352 | \r |
58380e9c | 353 | @param NameGuid A pointer to to the FFS filename GUID to search for \r |
354 | within any of the firmware volumes in the platform. \r | |
355 | @param SectionType Indicates the FFS section type to search for within \r | |
356 | the FFS file specified by NameGuid.\r | |
357 | @param SectionInstance Indicates which section instance within the FFS file \r | |
358 | specified by NameGuid to retrieve.\r | |
359 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
360 | containing the FFS file section that was found. \r | |
361 | Is it the caller's responsibility to free this buffer \r | |
362 | using FreePool().\r | |
b75a165d LG |
363 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
364 | \r | |
365 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
366 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 367 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to \r |
368 | retrieve the matching FFS section.\r | |
369 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
370 | device error.\r | |
371 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
372 | firmware volume that \r | |
b75a165d | 373 | contains the matching FFS section does not allow reads.\r |
f80b0830 | 374 | **/\r |
b0d803fe | 375 | EFI_STATUS\r |
376 | EFIAPI\r | |
eb9dd4d0 | 377 | GetSectionFromAnyFv (\r |
b0d803fe | 378 | IN CONST EFI_GUID *NameGuid,\r |
379 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 380 | IN UINTN SectionInstance,\r |
b0d803fe | 381 | OUT VOID **Buffer,\r |
382 | OUT UINTN *Size\r | |
383 | )\r | |
384 | {\r | |
385 | EFI_STATUS Status;\r | |
386 | EFI_HANDLE *HandleBuffer;\r | |
387 | UINTN HandleCount;\r | |
388 | UINTN Index;\r | |
389 | EFI_HANDLE FvHandle;\r | |
b0d803fe | 390 | \r |
391 | //\r | |
392 | // Search the FV that contain the caller's FFS first.\r | |
393 | // FV builder can choose to build FFS into the this FV\r | |
394 | // so that this implementation of GetSectionFromAnyFv\r | |
395 | // will locate the FFS faster.\r | |
396 | //\r | |
166152e8 | 397 | FvHandle = InternalImageHandleToFvHandle (gImageHandle);\r |
eb9dd4d0 | 398 | Status = InternalGetSectionFromFv (\r |
b0d803fe | 399 | FvHandle,\r |
400 | NameGuid,\r | |
401 | SectionType,\r | |
ff197efb | 402 | SectionInstance,\r |
b0d803fe | 403 | Buffer,\r |
404 | Size\r | |
405 | );\r | |
406 | if (!EFI_ERROR (Status)) {\r | |
407 | return EFI_SUCCESS;\r | |
408 | }\r | |
409 | \r | |
b0d803fe | 410 | HandleBuffer = NULL;\r |
411 | Status = gBS->LocateHandleBuffer (\r | |
412 | ByProtocol,\r | |
413 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
414 | NULL,\r | |
415 | &HandleCount,\r | |
416 | &HandleBuffer\r | |
417 | );\r | |
418 | if (EFI_ERROR (Status)) {\r | |
419 | goto Done;\r | |
420 | }\r | |
421 | \r | |
ff197efb | 422 | for (Index = 0; Index < HandleCount; Index++) {\r |
b0d803fe | 423 | //\r |
424 | // Skip the FV that contain the caller's FFS\r | |
425 | //\r | |
ff197efb | 426 | if (HandleBuffer[Index] != FvHandle) {\r |
eb9dd4d0 | 427 | Status = InternalGetSectionFromFv (\r |
ff197efb | 428 | HandleBuffer[Index], \r |
429 | NameGuid, \r | |
430 | SectionType, \r | |
431 | SectionInstance,\r | |
432 | Buffer, \r | |
433 | Size\r | |
434 | );\r | |
435 | \r | |
436 | if (!EFI_ERROR (Status)) {\r | |
437 | goto Done;\r | |
438 | }\r | |
b0d803fe | 439 | }\r |
440 | \r | |
b0d803fe | 441 | }\r |
442 | \r | |
443 | if (Index == HandleCount) {\r | |
444 | Status = EFI_NOT_FOUND;\r | |
445 | }\r | |
446 | \r | |
447 | Done:\r | |
448 | \r | |
116b142d LG |
449 | if (HandleBuffer != NULL) { \r |
450 | FreePool(HandleBuffer);\r | |
b0d803fe | 451 | }\r |
452 | return Status;\r | |
453 | \r | |
454 | }\r | |
455 | \r | |
f80b0830 | 456 | /**\r |
b75a165d LG |
457 | Searches the firmware volume that the currently executing module was loaded from and returns the first matching FFS section. \r |
458 | \r | |
459 | This function searches the firmware volume that the currently executing module was loaded \r | |
460 | from for an FFS file with an FFS filename specified by NameGuid. If the FFS file is found a search \r | |
461 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance \r | |
462 | instances of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.\r | |
463 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
464 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
465 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections are retrieved from \r | |
466 | an FFS file based on SectionType and SectionInstance.\r | |
467 | \r | |
468 | If the currently executing module was not loaded from a firmware volume, then EFI_NOT_FOUND is returned.\r | |
469 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
470 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
471 | \r | |
472 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
473 | If NameGuid is NULL, then ASSERT().\r | |
474 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 475 | If Size is NULL, then ASSERT().\r |
476 | \r | |
58380e9c | 477 | @param NameGuid A pointer to to the FFS filename GUID to search for \r |
478 | within the firmware volumes that the currently \r | |
479 | executing module was loaded from.\r | |
480 | @param SectionType Indicates the FFS section type to search for within \r | |
481 | the FFS file specified by NameGuid.\r | |
482 | @param SectionInstance Indicates which section instance within the FFS file \r | |
483 | specified by NameGuid to retrieve.\r | |
484 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
485 | containing the FFS file section that was found. \r | |
486 | Is it the caller's responsibility to free this buffer \r | |
487 | using FreePool().\r | |
b75a165d LG |
488 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
489 | \r | |
490 | \r | |
491 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
492 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 493 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
494 | the matching FFS section.\r | |
495 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
496 | device error.\r | |
497 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
498 | firmware volume that contains the matching FFS \r | |
499 | section does not allow reads. \r | |
f80b0830 | 500 | **/\r |
b0d803fe | 501 | EFI_STATUS\r |
502 | EFIAPI\r | |
eb9dd4d0 | 503 | GetSectionFromFv (\r |
b0d803fe | 504 | IN CONST EFI_GUID *NameGuid,\r |
505 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 506 | IN UINTN SectionInstance,\r |
b0d803fe | 507 | OUT VOID **Buffer,\r |
508 | OUT UINTN *Size\r | |
509 | )\r | |
510 | {\r | |
eb9dd4d0 | 511 | return InternalGetSectionFromFv (\r |
512 | InternalImageHandleToFvHandle(gImageHandle),\r | |
513 | NameGuid,\r | |
514 | SectionType,\r | |
515 | SectionInstance,\r | |
516 | Buffer,\r | |
517 | Size\r | |
518 | );\r | |
b0d803fe | 519 | }\r |
520 | \r | |
521 | \r | |
f80b0830 | 522 | /**\r |
b75a165d LG |
523 | Searches the FFS file the the currently executing module was loaded from and returns the first matching FFS section.\r |
524 | \r | |
525 | This function searches the FFS file that the currently executing module was loaded from for a FFS sections of type SectionType.\r | |
526 | If the FFS file contains at least SectionInstance instances of the FFS section specified by SectionType, \r | |
527 | then the SectionInstance instance is returned in Buffer. Buffer is allocated using AllocatePool(), \r | |
528 | and the size of the allocated buffer is returned in Size. It is the caller's responsibility \r | |
529 | to use FreePool() to free the allocated buffer. See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for \r | |
530 | details on how sections are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
531 | \r | |
532 | If the currently executing module was not loaded from an FFS file, then EFI_NOT_FOUND is returned.\r | |
533 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
534 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
535 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
536 | \r | |
537 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 538 | If Size is NULL, then ASSERT().\r |
539 | \r | |
b75a165d | 540 | \r |
58380e9c | 541 | @param SectionType Indicates the FFS section type to search for within \r |
542 | the FFS file that the currently executing module \r | |
543 | was loaded from.\r | |
544 | @param SectionInstance Indicates which section instance to retrieve within \r | |
545 | the FFS file that the currently executing module \r | |
546 | was loaded from.\r | |
547 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
548 | containing the FFS file section that was found. \r | |
549 | Is it the caller's responsibility to free this buffer \r | |
550 | using FreePool().\r | |
b75a165d LG |
551 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
552 | \r | |
553 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
554 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 555 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
556 | the matching FFS section.\r | |
557 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
558 | device error.\r | |
559 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
560 | firmware volume that contains the matching FFS \r | |
561 | section does not allow reads. \r | |
f80b0830 | 562 | \r |
563 | **/\r | |
b0d803fe | 564 | EFI_STATUS\r |
565 | EFIAPI\r | |
eb9dd4d0 | 566 | GetSectionFromFfs (\r |
b0d803fe | 567 | IN EFI_SECTION_TYPE SectionType,\r |
ff197efb | 568 | IN UINTN SectionInstance,\r |
b0d803fe | 569 | OUT VOID **Buffer,\r |
570 | OUT UINTN *Size\r | |
571 | )\r | |
572 | {\r | |
eb9dd4d0 | 573 | return InternalGetSectionFromFv(\r |
574 | InternalImageHandleToFvHandle(gImageHandle),\r | |
575 | &gEfiCallerIdGuid,\r | |
576 | SectionType,\r | |
577 | SectionInstance,\r | |
578 | Buffer,\r | |
579 | Size\r | |
580 | );\r | |
b0d803fe | 581 | }\r |
582 | \r | |
84716614 LG |
583 | \r |
584 | /**\r | |
585 | Get the image file buffer data and buffer size by its device path. \r | |
586 | \r | |
ea6898b9 | 587 | Access the file either from a firmware volume, from a file system interface, \r |
84716614 LG |
588 | or from the load file interface.\r |
589 | \r | |
590 | Allocate memory to store the found image. The caller is responsible to free memory.\r | |
591 | \r | |
3556c7a2 | 592 | If FilePath is NULL, then NULL is returned.\r |
84716614 LG |
593 | If FileSize is NULL, then NULL is returned.\r |
594 | If AuthenticationStatus is NULL, then NULL is returned.\r | |
595 | \r | |
58380e9c | 596 | @param[in] BootPolicy Policy for Open Image File.If TRUE, indicates \r |
597 | that the request originates from the boot \r | |
598 | manager, and that the boot manager is\r | |
599 | attempting to load FilePath as a boot\r | |
600 | selection. If FALSE, then FilePath must \r | |
601 | match an exact file to be loaded.\r | |
602 | @param[in] FilePath The pointer to the device path of the file\r | |
603 | that is absracted to the file buffer.\r | |
604 | @param[out] FileSize The pointer to the size of the abstracted \r | |
605 | file buffer.\r | |
3556c7a2 | 606 | @param[out] AuthenticationStatus Pointer to the authentication status.\r |
58380e9c | 607 | \r |
3556c7a2 | 608 | @retval NULL FilePath is NULL, or FileSize is NULL, or AuthenticationStatus is NULL, or the file can't be found.\r |
84716614 LG |
609 | @retval other The abstracted file buffer. The caller is responsible to free memory.\r |
610 | **/\r | |
611 | VOID *\r | |
612 | EFIAPI\r | |
613 | GetFileBufferByFilePath (\r | |
614 | IN BOOLEAN BootPolicy,\r | |
615 | IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath,\r | |
616 | OUT UINTN *FileSize,\r | |
617 | OUT UINT32 *AuthenticationStatus\r | |
618 | )\r | |
619 | {\r | |
620 | EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r | |
621 | EFI_DEVICE_PATH_PROTOCOL *OrigDevicePathNode;\r | |
95dd343a | 622 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePathNode;\r |
84716614 LG |
623 | EFI_HANDLE Handle;\r |
624 | EFI_GUID *FvNameGuid;\r | |
625 | EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;\r | |
626 | EFI_SECTION_TYPE SectionType;\r | |
627 | UINT8 *ImageBuffer;\r | |
628 | UINTN ImageBufferSize;\r | |
629 | EFI_FV_FILETYPE Type;\r | |
630 | EFI_FV_FILE_ATTRIBUTES Attrib;\r | |
631 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r | |
632 | EFI_FILE_HANDLE FileHandle;\r | |
633 | EFI_FILE_HANDLE LastHandle;\r | |
634 | EFI_FILE_INFO *FileInfo;\r | |
635 | UINTN FileInfoSize;\r | |
636 | EFI_LOAD_FILE_PROTOCOL *LoadFile;\r | |
637 | EFI_LOAD_FILE2_PROTOCOL *LoadFile2;\r | |
638 | EFI_STATUS Status;\r | |
639 | \r | |
640 | //\r | |
641 | // Check input File device path.\r | |
642 | //\r | |
643 | if (FilePath == NULL || FileSize == NULL || AuthenticationStatus == NULL) {\r | |
644 | return NULL;\r | |
645 | }\r | |
646 | \r | |
647 | //\r | |
648 | // Init local variable\r | |
649 | //\r | |
95dd343a | 650 | TempDevicePathNode = NULL;\r |
84716614 LG |
651 | FvNameGuid = NULL;\r |
652 | FileInfo = NULL;\r | |
653 | FileHandle = NULL;\r | |
654 | ImageBuffer = NULL;\r | |
655 | ImageBufferSize = 0;\r | |
656 | *AuthenticationStatus = 0;\r | |
657 | \r | |
658 | //\r | |
659 | // Copy File Device Path\r | |
660 | //\r | |
661 | OrigDevicePathNode = DuplicateDevicePath (FilePath);\r | |
662 | if (OrigDevicePathNode == NULL) {\r | |
663 | return NULL;\r | |
664 | }\r | |
665 | \r | |
666 | //\r | |
667 | // Check whether this device path support FV2 protocol.\r | |
668 | // Is so, this device path may contain a Image.\r | |
669 | //\r | |
670 | DevicePathNode = OrigDevicePathNode;\r | |
671 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &DevicePathNode, &Handle);\r | |
672 | if (!EFI_ERROR (Status)) {\r | |
673 | //\r | |
674 | // For FwVol File system there is only a single file name that is a GUID.\r | |
675 | //\r | |
676 | FvNameGuid = EfiGetNameGuidFromFwVolDevicePathNode ((CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) DevicePathNode);\r | |
677 | if (FvNameGuid == NULL) {\r | |
678 | Status = EFI_INVALID_PARAMETER;\r | |
679 | } else {\r | |
680 | //\r | |
681 | // Read image from the firmware file\r | |
682 | //\r | |
683 | Status = gBS->HandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID**)&FwVol);\r | |
684 | if (!EFI_ERROR (Status)) {\r | |
685 | SectionType = EFI_SECTION_PE32;\r | |
686 | ImageBuffer = NULL;\r | |
687 | Status = FwVol->ReadSection (\r | |
688 | FwVol,\r | |
689 | FvNameGuid,\r | |
690 | SectionType,\r | |
691 | 0,\r | |
692 | (VOID **)&ImageBuffer,\r | |
693 | &ImageBufferSize,\r | |
694 | AuthenticationStatus\r | |
695 | );\r | |
696 | if (EFI_ERROR (Status)) {\r | |
697 | //\r | |
698 | // Try a raw file, since a PE32 SECTION does not exist\r | |
699 | //\r | |
700 | if (ImageBuffer != NULL) {\r | |
701 | FreePool (ImageBuffer);\r | |
702 | *AuthenticationStatus = 0;\r | |
703 | }\r | |
704 | ImageBuffer = NULL;\r | |
705 | Status = FwVol->ReadFile (\r | |
706 | FwVol,\r | |
707 | FvNameGuid,\r | |
708 | (VOID **)&ImageBuffer,\r | |
709 | &ImageBufferSize,\r | |
710 | &Type,\r | |
711 | &Attrib,\r | |
712 | AuthenticationStatus\r | |
713 | );\r | |
714 | }\r | |
715 | }\r | |
716 | }\r | |
c119933d | 717 | if (!EFI_ERROR (Status)) {\r |
718 | goto Finish;\r | |
719 | }\r | |
84716614 LG |
720 | }\r |
721 | \r | |
722 | //\r | |
723 | // Attempt to access the file via a file system interface\r | |
724 | //\r | |
725 | DevicePathNode = OrigDevicePathNode;\r | |
726 | Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &DevicePathNode, &Handle);\r | |
727 | if (!EFI_ERROR (Status)) {\r | |
728 | Status = gBS->HandleProtocol (Handle, &gEfiSimpleFileSystemProtocolGuid, (VOID**)&Volume);\r | |
729 | if (!EFI_ERROR (Status)) {\r | |
730 | //\r | |
731 | // Open the Volume to get the File System handle\r | |
732 | //\r | |
733 | Status = Volume->OpenVolume (Volume, &FileHandle);\r | |
734 | if (!EFI_ERROR (Status)) {\r | |
95dd343a LG |
735 | //\r |
736 | // Duplicate the device path to avoid the access to unaligned device path node.\r | |
737 | // Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH\r | |
738 | // nodes, It assures the fields in device path nodes are 2 byte aligned.\r | |
739 | //\r | |
740 | TempDevicePathNode = DuplicateDevicePath (DevicePathNode);\r | |
741 | if (TempDevicePathNode == NULL) {\r | |
742 | FileHandle->Close (FileHandle);\r | |
c119933d | 743 | //\r |
744 | // Setting Status to an EFI_ERROR value will cause the rest of\r | |
745 | // the file system support below to be skipped.\r | |
746 | //\r | |
95dd343a | 747 | Status = EFI_OUT_OF_RESOURCES;\r |
95dd343a | 748 | }\r |
84716614 LG |
749 | //\r |
750 | // Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the\r | |
751 | // directory information and filename can be seperate. The goal is to inch\r | |
752 | // our way down each device path node and close the previous node\r | |
753 | //\r | |
95dd343a | 754 | DevicePathNode = TempDevicePathNode;\r |
c119933d | 755 | while (!EFI_ERROR (Status) && !IsDevicePathEnd (DevicePathNode)) {\r |
84716614 LG |
756 | if (DevicePathType (DevicePathNode) != MEDIA_DEVICE_PATH ||\r |
757 | DevicePathSubType (DevicePathNode) != MEDIA_FILEPATH_DP) {\r | |
758 | Status = EFI_UNSUPPORTED;\r | |
759 | break;\r | |
760 | }\r | |
761 | \r | |
762 | LastHandle = FileHandle;\r | |
763 | FileHandle = NULL;\r | |
764 | \r | |
765 | Status = LastHandle->Open (\r | |
766 | LastHandle,\r | |
767 | &FileHandle,\r | |
768 | ((FILEPATH_DEVICE_PATH *) DevicePathNode)->PathName,\r | |
769 | EFI_FILE_MODE_READ,\r | |
770 | 0\r | |
771 | );\r | |
772 | \r | |
773 | //\r | |
774 | // Close the previous node\r | |
775 | //\r | |
776 | LastHandle->Close (LastHandle);\r | |
777 | \r | |
778 | DevicePathNode = NextDevicePathNode (DevicePathNode);\r | |
779 | }\r | |
780 | \r | |
781 | if (!EFI_ERROR (Status)) {\r | |
782 | //\r | |
783 | // We have found the file. Now we need to read it. Before we can read the file we need to\r | |
784 | // figure out how big the file is.\r | |
785 | //\r | |
786 | FileInfo = NULL;\r | |
787 | FileInfoSize = 0;\r | |
788 | Status = FileHandle->GetInfo (\r | |
789 | FileHandle,\r | |
790 | &gEfiFileInfoGuid,\r | |
791 | &FileInfoSize,\r | |
792 | FileInfo\r | |
793 | );\r | |
794 | \r | |
795 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
796 | FileInfo = AllocatePool (FileInfoSize);\r | |
797 | if (FileInfo == NULL) {\r | |
798 | Status = EFI_OUT_OF_RESOURCES;\r | |
799 | } else {\r | |
800 | Status = FileHandle->GetInfo (\r | |
801 | FileHandle,\r | |
802 | &gEfiFileInfoGuid,\r | |
803 | &FileInfoSize,\r | |
804 | FileInfo\r | |
805 | );\r | |
806 | }\r | |
807 | }\r | |
808 | \r | |
e191bb14 | 809 | if (!EFI_ERROR (Status) && (FileInfo != NULL)) {\r |
93e8630a | 810 | if ((FileInfo->Attribute & EFI_FILE_DIRECTORY) == 0) {\r |
84716614 | 811 | //\r |
93e8630a | 812 | // Allocate space for the file\r |
84716614 | 813 | //\r |
93e8630a RN |
814 | ImageBuffer = AllocatePool ((UINTN)FileInfo->FileSize);\r |
815 | if (ImageBuffer == NULL) {\r | |
816 | Status = EFI_OUT_OF_RESOURCES;\r | |
817 | } else {\r | |
818 | //\r | |
819 | // Read the file into the buffer we allocated\r | |
820 | //\r | |
821 | ImageBufferSize = (UINTN)FileInfo->FileSize;\r | |
822 | Status = FileHandle->Read (FileHandle, &ImageBufferSize, ImageBuffer);\r | |
823 | }\r | |
84716614 LG |
824 | }\r |
825 | }\r | |
826 | }\r | |
827 | //\r | |
95dd343a | 828 | // Close the file and Free FileInfo and TempDevicePathNode since we are done\r |
84716614 LG |
829 | // \r |
830 | if (FileInfo != NULL) {\r | |
831 | FreePool (FileInfo);\r | |
832 | }\r | |
833 | if (FileHandle != NULL) {\r | |
834 | FileHandle->Close (FileHandle);\r | |
835 | }\r | |
c119933d | 836 | if (TempDevicePathNode != NULL) {\r |
837 | FreePool (TempDevicePathNode);\r | |
838 | }\r | |
84716614 LG |
839 | }\r |
840 | }\r | |
c119933d | 841 | if (!EFI_ERROR (Status)) {\r |
842 | goto Finish;\r | |
843 | }\r | |
84716614 LG |
844 | }\r |
845 | \r | |
846 | //\r | |
847 | // Attempt to access the file via LoadFile2 interface\r | |
848 | //\r | |
849 | if (!BootPolicy) {\r | |
850 | DevicePathNode = OrigDevicePathNode;\r | |
851 | Status = gBS->LocateDevicePath (&gEfiLoadFile2ProtocolGuid, &DevicePathNode, &Handle);\r | |
852 | if (!EFI_ERROR (Status)) {\r | |
853 | Status = gBS->HandleProtocol (Handle, &gEfiLoadFile2ProtocolGuid, (VOID**)&LoadFile2);\r | |
854 | if (!EFI_ERROR (Status)) {\r | |
855 | //\r | |
856 | // Call LoadFile2 with the correct buffer size\r | |
857 | //\r | |
858 | ImageBufferSize = 0;\r | |
859 | ImageBuffer = NULL;\r | |
860 | Status = LoadFile2->LoadFile (\r | |
861 | LoadFile2,\r | |
862 | DevicePathNode,\r | |
863 | FALSE,\r | |
864 | &ImageBufferSize,\r | |
865 | ImageBuffer\r | |
866 | );\r | |
867 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
868 | ImageBuffer = AllocatePool (ImageBufferSize);\r | |
869 | if (ImageBuffer == NULL) {\r | |
870 | Status = EFI_OUT_OF_RESOURCES;\r | |
871 | } else {\r | |
872 | Status = LoadFile2->LoadFile (\r | |
873 | LoadFile2,\r | |
874 | DevicePathNode,\r | |
c083f7ca | 875 | FALSE,\r |
84716614 LG |
876 | &ImageBufferSize,\r |
877 | ImageBuffer\r | |
878 | );\r | |
879 | }\r | |
880 | }\r | |
881 | }\r | |
c119933d | 882 | if (!EFI_ERROR (Status)) {\r |
883 | goto Finish;\r | |
884 | }\r | |
84716614 LG |
885 | }\r |
886 | }\r | |
887 | \r | |
888 | //\r | |
889 | // Attempt to access the file via LoadFile interface\r | |
890 | //\r | |
891 | DevicePathNode = OrigDevicePathNode;\r | |
892 | Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &DevicePathNode, &Handle);\r | |
893 | if (!EFI_ERROR (Status)) {\r | |
894 | Status = gBS->HandleProtocol (Handle, &gEfiLoadFileProtocolGuid, (VOID**)&LoadFile);\r | |
895 | if (!EFI_ERROR (Status)) {\r | |
896 | //\r | |
897 | // Call LoadFile with the correct buffer size\r | |
898 | //\r | |
899 | ImageBufferSize = 0;\r | |
900 | ImageBuffer = NULL;\r | |
901 | Status = LoadFile->LoadFile (\r | |
902 | LoadFile,\r | |
903 | DevicePathNode,\r | |
904 | BootPolicy,\r | |
905 | &ImageBufferSize,\r | |
906 | ImageBuffer\r | |
907 | );\r | |
908 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
909 | ImageBuffer = AllocatePool (ImageBufferSize);\r | |
910 | if (ImageBuffer == NULL) {\r | |
911 | Status = EFI_OUT_OF_RESOURCES;\r | |
912 | } else {\r | |
913 | Status = LoadFile->LoadFile (\r | |
914 | LoadFile,\r | |
915 | DevicePathNode,\r | |
916 | BootPolicy,\r | |
917 | &ImageBufferSize,\r | |
918 | ImageBuffer\r | |
919 | );\r | |
920 | }\r | |
921 | }\r | |
922 | }\r | |
923 | }\r | |
924 | \r | |
925 | Finish:\r | |
926 | \r | |
927 | if (EFI_ERROR (Status)) {\r | |
928 | if (ImageBuffer != NULL) {\r | |
929 | FreePool (ImageBuffer);\r | |
930 | ImageBuffer = NULL;\r | |
931 | }\r | |
932 | *FileSize = 0;\r | |
933 | } else {\r | |
934 | *FileSize = ImageBufferSize;\r | |
935 | }\r | |
936 | \r | |
937 | FreePool (OrigDevicePathNode);\r | |
938 | \r | |
939 | return ImageBuffer;\r | |
940 | }\r | |
711ef3f6 SC |
941 | \r |
942 | /**\r | |
943 | Searches all the available firmware volumes and returns the file device path of first matching\r | |
944 | FFS section.\r | |
945 | \r | |
946 | This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.\r | |
947 | The order that the firmware volumes is searched is not deterministic. For each FFS file found a search\r | |
948 | is made for FFS sections of type SectionType.\r | |
949 | \r | |
950 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,\r | |
951 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
952 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
953 | \r | |
954 | If NameGuid is NULL, then ASSERT().\r | |
955 | \r | |
956 | @param NameGuid A pointer to to the FFS filename GUID to search for\r | |
957 | within any of the firmware volumes in the platform.\r | |
958 | @param SectionType Indicates the FFS section type to search for within\r | |
959 | the FFS file specified by NameGuid.\r | |
960 | @param SectionInstance Indicates which section instance within the FFS file\r | |
961 | specified by NameGuid to retrieve.\r | |
962 | @param FvFileDevicePath Device path for the target FFS\r | |
963 | file.\r | |
964 | \r | |
965 | @retval EFI_SUCCESS The specified file device path of FFS section was returned.\r | |
966 | @retval EFI_NOT_FOUND The specified file device path of FFS section could not be found.\r | |
967 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a\r | |
968 | device error.\r | |
969 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the\r | |
970 | firmware volume that contains the matching FFS section does not\r | |
971 | allow reads.\r | |
972 | @retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.\r | |
973 | \r | |
974 | **/\r | |
975 | EFI_STATUS\r | |
976 | EFIAPI\r | |
977 | GetFileDevicePathFromAnyFv (\r | |
978 | IN CONST EFI_GUID *NameGuid,\r | |
979 | IN EFI_SECTION_TYPE SectionType,\r | |
980 | IN UINTN SectionInstance,\r | |
981 | OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath\r | |
982 | )\r | |
983 | {\r | |
984 | EFI_STATUS Status;\r | |
985 | EFI_HANDLE *HandleBuffer;\r | |
986 | UINTN HandleCount;\r | |
987 | UINTN Index;\r | |
988 | EFI_HANDLE FvHandle;\r | |
989 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
990 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *TempFvFileDevicePath;\r | |
991 | VOID *Buffer;\r | |
992 | UINTN Size;\r | |
993 | \r | |
994 | if (FvFileDevicePath == NULL) {\r | |
995 | return EFI_INVALID_PARAMETER;\r | |
996 | }\r | |
997 | \r | |
998 | HandleBuffer = NULL;\r | |
999 | FvDevicePath = NULL;\r | |
1000 | TempFvFileDevicePath = NULL;\r | |
1001 | Buffer = NULL;\r | |
1002 | Size = 0;\r | |
1003 | \r | |
1004 | //\r | |
1005 | // Search the FV that contain the caller's FFS first.\r | |
1006 | // FV builder can choose to build FFS into the this FV\r | |
1007 | // so that this implementation of GetSectionFromAnyFv\r | |
1008 | // will locate the FFS faster.\r | |
1009 | //\r | |
1010 | FvHandle = InternalImageHandleToFvHandle (gImageHandle);\r | |
1011 | Status = InternalGetSectionFromFv (\r | |
1012 | FvHandle,\r | |
1013 | NameGuid,\r | |
1014 | SectionType,\r | |
1015 | SectionInstance,\r | |
1016 | &Buffer,\r | |
1017 | &Size\r | |
1018 | );\r | |
1019 | if (!EFI_ERROR (Status)) {\r | |
1020 | goto Done;\r | |
1021 | }\r | |
1022 | \r | |
1023 | Status = gBS->LocateHandleBuffer (\r | |
1024 | ByProtocol,\r | |
1025 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
1026 | NULL,\r | |
1027 | &HandleCount,\r | |
1028 | &HandleBuffer\r | |
1029 | );\r | |
1030 | if (EFI_ERROR (Status)) {\r | |
1031 | goto Done;\r | |
1032 | }\r | |
1033 | \r | |
1034 | for (Index = 0; Index < HandleCount; Index++) {\r | |
1035 | //\r | |
1036 | // Skip the FV that contain the caller's FFS\r | |
1037 | //\r | |
1038 | if (HandleBuffer[Index] != FvHandle) {\r | |
1039 | Status = InternalGetSectionFromFv (\r | |
1040 | HandleBuffer[Index],\r | |
1041 | NameGuid,\r | |
1042 | SectionType,\r | |
1043 | SectionInstance,\r | |
1044 | &Buffer,\r | |
1045 | &Size\r | |
1046 | );\r | |
1047 | \r | |
1048 | if (!EFI_ERROR (Status)) {\r | |
1049 | //\r | |
1050 | // Update FvHandle to the current handle.\r | |
1051 | //\r | |
1052 | FvHandle = HandleBuffer[Index];\r | |
1053 | goto Done;\r | |
1054 | }\r | |
1055 | }\r | |
1056 | }\r | |
1057 | \r | |
1058 | if (Index == HandleCount) {\r | |
1059 | Status = EFI_NOT_FOUND;\r | |
1060 | }\r | |
1061 | \r | |
1062 | Done:\r | |
1063 | if (Status == EFI_SUCCESS) {\r | |
1064 | //\r | |
1065 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r | |
1066 | //\r | |
1067 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1068 | if (EFI_ERROR (Status)) {\r | |
1069 | *FvFileDevicePath = NULL;\r | |
1070 | } else {\r | |
1071 | TempFvFileDevicePath = AllocateZeroPool (sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH) + END_DEVICE_PATH_LENGTH);\r | |
1072 | if (TempFvFileDevicePath == NULL) {\r | |
1073 | *FvFileDevicePath = NULL;\r | |
1074 | return EFI_OUT_OF_RESOURCES;\r | |
1075 | }\r | |
1076 | EfiInitializeFwVolDevicepathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH*)TempFvFileDevicePath, NameGuid);\r | |
1077 | SetDevicePathEndNode (NextDevicePathNode (TempFvFileDevicePath));\r | |
1078 | *FvFileDevicePath = AppendDevicePath (\r | |
1079 | FvDevicePath,\r | |
1080 | (EFI_DEVICE_PATH_PROTOCOL *)TempFvFileDevicePath\r | |
1081 | );\r | |
1082 | FreePool (TempFvFileDevicePath);\r | |
1083 | }\r | |
1084 | }\r | |
1085 | \r | |
1086 | if (Buffer != NULL) {\r | |
1087 | FreePool (Buffer);\r | |
1088 | }\r | |
1089 | \r | |
1090 | if (HandleBuffer != NULL) {\r | |
1091 | FreePool (HandleBuffer);\r | |
1092 | }\r | |
1093 | \r | |
1094 | return Status;\r | |
1095 | }\r |